revisit warnings - variable labels - units about fldgen HOT 1 OPEN

# The alternative was to write  generate.TP.fullgrids
   # with arguments that expect a user to provide
   # p_convert = emulator$griddataP$pvarconvert_fcn from a stored emulator
   # or to give p_convert = log. This basically opens up the option for
   # users to make more errors.
   # If anything, I'm inclined to remove the arguments
   #  tvarunconvert_fcn = NULL, pvarunconvert_fcn = exp
   # from generate.TP.fullgrids. We initially included things that way
   # so that a user could experiment with variables other than T and P.